One of theses two Slip Yokes is required to connect your drive shaft to the CD009 when using the CD Pro Bellhousing kit. Sometimes hard to find locally we allow you to get it with the rest of the kit Details -1310 Smaller Rated at 400 lb-ft of continuous torque and 800 lb-ft of short-term torqueSpline Count: 30/32 Spline Diameter: 1.378 Hub Diameter: 1.728 Hub Centerline To End:6.102 Centerline To Washer:1.375Counterbore Diameter:1.380 Counterbore Depth:0.393 *REQUIRES A 1310 SERIES UNIVERSAL JOINT -1350 Larger Rated at 1,240 lb-ft of continuous torque and 1,680 lb-ft of short-term torque.Spline Count: 30/32 Spline Diameter:1.378 Hub Diameter:1.731 Hub Centerline To End:6.102 Centerline To Washer:1.250 Counterbore Diameter:1.375 Counterbore Depth:0.393*REQUIRES A 1350 SERIES UNIVERSAL JOINT Fitment To be used when linking your CD009 transmission to a custom drive shaft